Treasury Bond (T-Bond)
How Treasury Bonds Work
The U.S. government issues Treasury bonds to finance federal spending. You’re essentially lending money to the government. In exchange, you receive semiannual interest payments at a fixed rate, and your principal back when the bond matures.
T-bonds are sold at auction through TreasuryDirect.gov or via brokerages. They’re issued with a par value of $100 (the minimum purchase), and the coupon rate is set at auction based on market demand and prevailing interest rates.
After issuance, T-bonds trade actively on the secondary market. Their prices move inversely with interest rates — when rates rise, bond prices fall, and vice versa. Because T-bonds have long maturities, they have high duration, which means their prices are especially sensitive to rate changes.
Treasury Bonds vs. Other Treasury Securities
Treasury bonds are one of three main types of marketable Treasury debt. The differences come down to maturity.
| Security | Maturity | Interest Payment | Minimum Purchase |
|---|---|---|---|
| Treasury Bill (T-Bill) | 4 weeks to 52 weeks | None — sold at a discount to face value | $100 |
| Treasury Note (T-Note) | 2, 3, 5, 7, or 10 years | Semiannual fixed coupon | $100 |
| Treasury Bond (T-Bond) | 20 or 30 years | Semiannual fixed coupon | $100 |
| TIPS | 5, 10, or 30 years | Semiannual — adjusted for inflation | $100 |
The 10-year Treasury note is the most widely followed benchmark for interest rates in the U.S. economy. But for investors seeking the longest-duration government exposure, the 30-year T-bond is the instrument of choice.
Treasury Bond Yields
The yield on a Treasury bond reflects what investors demand for lending to the government over a long time horizon. Two yield measures matter most:
Coupon rate: The fixed annual interest rate set at issuance. A T-bond with a 4.25% coupon on a $1,000 face value pays $42.50 per year ($21.25 every six months).
Yield to maturity (YTM): The total annualized return if you buy at the current market price and hold until maturity. If the bond trades below par, YTM exceeds the coupon rate. If it trades above par, YTM is lower.
Treasury yields serve as the baseline for pricing virtually all other fixed-income securities. The credit spread on a corporate bond is measured as the yield difference above a comparable-maturity Treasury. The yield curve — which plots Treasury yields across maturities — is one of the most important indicators in finance.
Why Treasury Bonds Matter
The “risk-free” benchmark: Because U.S. Treasuries carry essentially zero default risk, they serve as the risk-free rate in financial models like WACC and the Capital Asset Pricing Model. Every other fixed-income security is priced relative to Treasuries.
Safe-haven asset: During recessions, market panics, and geopolitical crises, investors flock to Treasuries. This “flight to quality” drives prices up and yields down — which is why T-bonds often rally when stocks are crashing.
Economic signal: The yield curve built from Treasury securities tells you what the market thinks about future growth and inflation. An inverted yield curve — where short-term yields exceed long-term — has preceded every U.S. recession since the 1960s.
Risks of Treasury Bonds
Interest rate risk: This is the primary risk. T-bonds have the highest duration among Treasury securities, meaning their prices swing the most when rates change. A 30-year T-bond with a duration of ~20 years would lose roughly 20% of its market value if interest rates rose by 1 percentage point.
Inflation risk: Fixed coupon payments lose real purchasing power during inflationary periods. If inflation averages 4% and your T-bond coupon is 3.5%, you’re losing ground in real terms. TIPS (Treasury Inflation-Protected Securities) address this by adjusting the principal for inflation.
Opportunity cost: Locking into a 30-year commitment means potentially missing higher yields if rates rise. This is less of an issue if you plan to trade rather than hold to maturity.
No credit risk: The U.S. government has never defaulted on its debt. While credit rating agencies have occasionally adjusted the U.S. sovereign rating, the market continues to treat Treasuries as the global standard for safety.
Tax Treatment
Interest income from Treasury bonds is taxed at the federal level as ordinary income. However, it is exempt from state and local income taxes — a meaningful advantage for investors in high-tax states like California or New York.
This state-tax exemption is one reason Treasuries can be competitive with municipal bonds for some investors, even though munis offer federal tax exemption. Always compare on an after-tax basis using the tax-equivalent yield.
How to Buy Treasury Bonds
TreasuryDirect: Buy directly from the U.S. government at auction. No commissions, $100 minimum. Best for buy-and-hold investors.
Brokerage account: Buy on the secondary market through any major broker. Gives you flexibility to trade before maturity and access to a wider range of maturities and prices.
Bond ETFs and mutual funds: For instant diversification across maturities. Long-term Treasury ETFs focus on the 20-30 year range and are popular for portfolio hedging. Check the fund’s expense ratio and effective duration.
Key Takeaways
- Treasury bonds are 20- or 30-year U.S. government securities that pay a fixed semiannual coupon.
- They carry essentially zero default risk and serve as the global benchmark “risk-free” rate.
- The primary risk is interest rate risk — long duration makes T-bond prices highly sensitive to rate changes.
- Interest is federally taxable but exempt from state and local income taxes.
- Treasury yields form the foundation of the yield curve and are used to price all other fixed-income securities.
- Buy through TreasuryDirect, a brokerage, or bond ETFs depending on your needs.
Frequently Asked Questions
Are Treasury bonds a good investment?
Treasury bonds are among the safest investments available and work well as a portfolio stabilizer, a source of predictable income, or a hedge against equity downturns. However, they carry significant interest rate risk due to their long duration, and their yields may not keep pace with inflation in all environments.
What is the difference between a Treasury bond and a Treasury note?
Maturity. Treasury notes mature in 2 to 10 years, while Treasury bonds mature in 20 or 30 years. Both pay semiannual coupons and share the same credit quality. T-bonds have higher duration, which means more price sensitivity to interest rate movements.
Can you lose money on Treasury bonds?
If you hold to maturity, you’ll receive full face value (the U.S. government has never defaulted). But if you sell before maturity, the market price may be lower than what you paid — especially if interest rates have risen since you bought the bond.
How are Treasury bond yields determined?
Initial coupon rates are set at auction based on competitive bidding. After issuance, yields fluctuate on the secondary market as prices change. Key drivers include Federal Reserve policy, inflation expectations, economic growth outlook, and global demand for safe-haven assets.
What is the 30-year Treasury yield used for?
The 30-year yield serves as a benchmark for long-term borrowing costs across the economy. It influences mortgage rates, corporate borrowing costs, and pension fund calculations. It’s also a key input in the yield curve, which signals market expectations about future economic conditions.